Apparatus for making hose



Aug. I5, 1949'. K. PAPE APPARATUS Fon MAKING HosE Original Filed Jan.26, 1946 Patented Aug. 1s, 1949 APPARATUS Fon MAKnvG HosE Karl Pape,deceased,`late of Dover, N. J., by Viola M. Pape, executrix, Dover, N.J., assignor to Resistoilex Corporation,

poration of New York Original-application January 26,-1946, Serial No.643,732. Divided and this application March 19, 1947, Serial No.-735,818

. 7 claims. (01.154-45) This invention relates to apparatus for use inmanufacturing flexible hose, more particularly hose having two or morelayers of textile fabric as components of its wall. More particularly itrelates to apparatus adapted for use in forming an adhesive bond betweenany two of such layers according to the method described and claimed inthe copending application of Karl Pape, Serial No. 643,732, filedJanuary 26, 1946, of which this application is a division.

According to the method particularly described in the aforesaid parentapplication, a hose or exible tubing having at least one layer oftextile fabric on its outer surface, such as cotton braid for example,is first wetted with water and then coated with powdered polyvinylalcohol in such an amount as will adhere to the wetted surface. A secondlayer of fabric is formed over the thus coated surface, forexample bybraiding, and the 'hose or tubing is then passed through a chamber inwhich it is bathed with steam.

IWhile v the apparatus herein described is adapted particularly tocarrying out the aforesaid speciflc method, in which the adhesive ispolyvinyl alcohol, the solvent therefor being water, it will readily beappreciated that it is equally adaptable for use with other types ofcomminuted adhesives used in dry form which may require the use ofsolvents other than water or the vapor thereof.

The present invention resides in the novel elements and combinationsA ofelements hereinafter Belleville, N. J., a corthereon at the point 2|where the yarns22 meet vthe tubing. After being braided, the tubingrpasses over a capstan 24 against which it is pressed by aspring-actuated roller 25. Auxiliary rollers 26 may be used to assist indrawing the tubing through the braiding machine. As the tubing 2U leavesthe capstan, it passes through a solvent applying device 28 comprising achamber having an inlet 29 and an outlet 30 for the tubing, a pipe 3|'for introducing solvent vapor into the chamber and another pipe 32 whichserves as a drain. This device may be constructed as shown in U. S.Patents 2,262,514 and 2,262,515, issued November 11, 1941, to whichreference is made for a more detailed description.

To maintain the tubing 20 under an inflating pressure during theprocessing, to provide a firm foundation for the braid and press thelayers together, one end is connected at 34 ywith a compressed air line35 by means of a exible hose 36, the applied pressure being shown by agage 38. It will be understood that the other end of the tubing will beclosed to cause the desired lair pressure to build up therein and thatthe tubing described, certain illustrative embodiments of which areshown in the drawings in which:

Fig. 1 is a diagrammatic representation of apparatus used in the makingof hose having two or more layers of textile fabric adhered together;and

Fig. 2 is a vertical central section through that part of the apparatusin which the solvent and powdered adhesive material are applied to thehose, the latter being shown in position therein.

Referring to Fig. 1, the drawing shows certain parts of a common type ofbraiding machine, including a slotted plate the slots in which determinethe travel of carriers l2 which are actuated ln the usual manner by agear train (not shown). Each carrier holds the usual cylindricalcross-wound spool |5 and is provided with the usual yarn tensioningdevice I8. The plate l has a central aperture I8 through which passesthe tubing 20 to be covered. As is well known.

the carriers, which may vary in number' but of which there are usuallyat least 24, travel about the tub/ing in such manner as to weave a braiditself at this stage is impermeable to air by virtue vof a non-porouslayer.

The tubing entering the braiding machine is shown as having one layer ofbraid forming its outer surface and a second layer of braid as beingapplied on top of it. It will be understood, of course, that the processcan be repeated as often as may be desired to provide any number oflayers of braid.

Before the tubing 20 enters the braiding mechanism, it passes through awetting and powderapplying device 40 shown in detail in Fig. 2. Inpassing through the lower part 4|, the tubing is wetted with water orother solvent for the adhesive, supplied from a containerA 42 mountedfor vertical movement as, for example, on the pivoted arm 44 so that bylowering the container 42 into the position shown in dotted lines, theliquid contained in the lower part 4| of the device 40 can be drainedoff in the event the movement of the tubing 20, is stopped forreasons'hereinafter explained. In the upper part 45 of the device 4D,the wetted tubing is coated with a layer of powdered adhesive, whichnaturally adheres to the moist fabric, and the next layer of braid isformed at the point 2|, sealing the powder between the two layers ofbraid.

Referring to Fig. 2, the detailed construction of the device 40 is asfollows: the lower part 4| comprises a cylindrical chamber internallythreaded in its lower end to receive 'a bottom member 50 having a fiatlower surface 5| and a conical upper surface 52. The member 50 has acentral aperture sufficient to permit the free pas,- sage of the tubing20 therethrough and a watertight seal is provided by a soft rubbergasket 54 which may be compressed against the lower surface of member 50by a threaded annular nut 55 bearing against a metal washer 56. A pipe58 is screwed into an aperture in the chamber 4l which is positionedbelow the top of the member 50. A flexible hose 59 connects the pipe 58with the container 42.

The solvent chamber 4| is externally threaded at its upper end toreceive an internally threaded collar 60. This collar is also internallythreaded at its upper end to receive a plug 6| forming the bottom of ahopper 62. The plug 6| has a central aperture 64 to permit free passageof tubing 20 and below this aperture is a second rubber washer 65, metalwasher 66 and threaded annular collar 61, forming an adjustable seal toprevent the material in the hopper 62 from falling into the chamber 4|and which may be adjustedto remove excess solvent by exerting pressureon the tubing .20. In order to keep the loosely powdered Amaterial 'I0in the hopper 62 in contact with the tubing 20 at all times, anysuitable vibrating device 1| may be provided to be operated electricallyor mechanically in a known manner so as to render the powder mobile andcause it to flow into contact with the tubing. y

Operation Tubing having one or more layers of braid on it is pushed upthrough washer 54, through the chamber 4| and through washer 65 and thehopper 62, chamber 4| being empty at this time. Nut 55 is adjusted withthe minimum pressure required to keep liquid from leaking out of thechamber. Nut 61 may be adjusted to give any desired pressure on thetubing. The looser its adjustment the wetter the tubing will be as itenters the hopper. Reservoir 42 is raised to permit liquid to flow intochamber 4| to the desired depth. Because of the rather slow movement oftubing through a braider, it is sumcient if about an inch of water ismaintained in chamber 4|, the water level being adjusted by raising orlowering reservoir 42. Because it isnecessary to stop braidersperiodically to add yarn spools, chamber 4| should be drained bylowering the reservoir, especially where the hose liner is of polyvinylalcohol composition, which is affected by water, to prevent excessive ornon-uniform wetting of the braid or damage to the liner through thesolvent action of excess water.

As tubing 2|) passes upwardly through the device 4|) and the braider, alayer of adhesive powder adheres to its moistened outer surface and anew layer of braid is applied thereover. When this composite articlepasses through the chamber 28,

solvent vapor is supplied to the adhesive through -the newly appliedbraid and this, together with the moisture in the underlying braid,exercise a dissolving action on the adhesive powder which becomesstrongly adherent to both layers of braid, With the method described theadhesive, since it is not liquefied, does not soak into or impregnateeither layer of braid and its adhesive action is therefore limited tothe adjacent surface fibers of the two layers of braid, which is theonly place where adhesive serves a useful purpose in bonding the layers.As a result, the braid layers maintain most of their originalpliability. At the same time, because the concentration of adhesive 4 atthe adhered surfaces is much greater than where a solution of adhesiveis used, the strength of the bond between layers of braid is very muchgreater.

It is to be understood that the specific apparatus described above it tobe construed merely as an illustrative embodiment of the-invention whichis defined in the appended claims and not as a limitation thereof sincevarious changes in details of construction may be made without departingfrom the spirit of the invention as claimed.

What is claimed is:

l. Apparatus for adherently applying a second covering of textile fabricto a hose having a first covering of textile fabric comprising, incombination, means for wetting said first covering with solvent for an'adhesive, means for applying a dry powdered adhesive to said wettedcovering, means for forming said second covering over the powder-coatedsurface. and means for applying vapor to the hose externally of thesecond covermg.

2. Apparatus for successively' wetting and applying a dry comminutedmaterial to a linear article passing therethrough in an upward directioncomprising, a lower chamber, a seal at the bottom thereof adapted topermit the passage of said article, means for supplying liquid to saidchamber, a hopper, a seal at the bottom thereof adapted to permit thepassage of said article,

- said hopper being mounted above said chamber hose upwardly,

with said seals in alinement, whereby said article passes successivelythrough said liquid and said' material.

3. In combination with a braider adapted to weave braid on a tubingpassing upwardly therethrough, said braid being formed at a braidingpoint, means for coating the surface of said tubing under said braidcomprising, a hopper positioned beneath said braiding point adapted tocontain dry comminuted material and having an opening in its bottom-closely fitting said tubing, a liquid chamber positioned beneath saidhopper and having an opening in its bottom closely fitting said tubing,a liquid reservoir, and a conduit connecting said chamber with saidreservoir.

4. Apparatus for applying dry particulate material to the surface of ahose having an absorbent outer surface comprising, means for moving thea pair of alined receptacles mounted one above the other and havingapertures through which said hose may pass, the lower one of saidreceptacles being adapted to contain fluid to wet the surface of saidhose and the upper one of said receptacles being adapted to containparticulate material in contact with said' wetted surface.

5. Apparatus according to claim 4 in which the receptacle for containingparticulate material is equipped with agitating means to render saidmaterial mobile and maintain it in contact with said hose.

6. A coating device for linear articles comprising a hopper having abottom opening, a compressible annular seal surrounding said opening,means for compressing said seal, a collar adapted for attachment to thelower part of said hopper, a liquid chamber having its upper end adaptedfor connection to said collar and having a bottom opening, acompressible annular seal around said opening, means for compressingsaid seal, and means for introducing liquid into and draining it fromsaid chamber.

7. Apparatus for adherently applying a second 5 6 braid to a hose havinga rst braid thereon comprising, a solventl chamber through which theREFERENCES CITED I hose passes to Wet the first braid a hopper sur' Thefollowing references are of record in the rounding the path of the hoseto contain a dry me of th-s aten adhesive, a braider adapted to formbraid over 5 1 p t' the adhesive-coated surface, a substantially UNITEDSTATES PATENTS closed chamber through which the hose passes Number Namel Date after the formation of the second braid, and 1,187,008 NehringJune 13,1916 means for introducing vapor into said last men- 2,127,413Legumon Aug, 15, 1938 tloned Chamb??- 10 2,262,514 Pape Nov. 11, 1941 t1, l y VIOLA M. PAPE, Eecutrz of the'LEstate of Karl Pape, Deceased.

